I'm surprised about the big snakes, i have never seen anything except dead in the road. When i was living in Samar i would try and look for snakes but never found one. It sometimes felt like there was no wildlife at all. What used to be a problem for us was the big centipede which can give a nasty bite. They would always get into the house. I don't know how big they are in Bohol, i did see small ones when i was there in March.